If you're training a Solo Ramza game, it'll be less stressful because once you learn it with Ramza, to hell with the others. One Zodiac is better than wasted hours on attempts to have 5 Zodiac users. And yes, you should dump all invites and generic users for Boco, Agrais, those characters. And you'll have to keep Orlandu, or you're just plain crazy. If your not gonna use him, use his Excalibur and his Crystal armour.